Tube type collector



July 6, 1943. O DANZ 2,323,707

TUBE TYPE COLLECTOR Filed June 21, 1940 3 Sheets- Sheet l 3 cu mJmludo'u in HARRYQDAN JWA y 1943. H. o. DANZ TUBE TYPE COLLECTOR FiledJune 21, 1940 3 Sheets-Sheet 2 mm W mm mm QM mm L ML ww wwm om 2 (NM \Qv3 v n 0. m a a h 1 u u a n F 1 1 I I I L l l 1 l I I I I l l l I I I I lI I l I Ir I l l I I l I I l l I 1 I I I l n w \W V .Tmem HARRY 0, DANZ,

H. o. DANZ 2,323,707

TUBE TYPE COLLECTOR Filed June 21, 1940 3 Sheets-Sheet 3 w n 0 W mm Q wn" J w u R 3 M E ,0, m g 4 fir wu H 7 /|6 2 I n July 6, 1943.

Patented July 6, 1943 TUBE TYPE COLLECTOR Harry 0. Dana, Detroit, Micla,assignor to American Blower Corporation. Detroit, Mich, a corporation ofDelaware Application June 21, 1940, Serial No. 341,682

2 Claims. (Cl. 183-80) My invention relates to dust collectors.

It is the object of my invention to separate and collect dust from airor gas.

An object of the invention is to provide a multiple tube dust collectorwherein all of the inlet tubes that carry the dust ladened air open intoa common dust collecting chamber, and wherein means is provided withinthe discharge end of the inlet tubes for directing the discharging dustfrom the inlet tubes in substantially parallel streams so that thedischarging dust from adjacent tubes will not interfere with another orproduce turbulence at the discharge end of the discharge tubes.

Another object of the invention is to provide a multiple tube dustcollector wherein a baflle means is positioned in the discharge end ofthe inlet tubes for the dust ladened air so that the dust separated fromthe dust ladened air will discharge along the inner periphery of theinlet tubes into a common chamber, and wherein the bailie is positionedinwardly of the end of the discharge end of the inlet tubes so that thedischarging streams of dust will flow from the tubes in substantiallyparallel streams and thus prevent interference between the dischargingdust streams from adjacent tubes.

Another object of the invention is to provide a multiple tube dustcollector in accordance with the foregoing objects wherein the clean airis discharged in the same direction as the dust but through a separatetube.

Another object of the invention is to provide a multiple tube dustcollector in accordance with the first two objects wherein the clean airdis-1 charges from the inlet tubes in the direction opposite to theinlet flow.

Referring to the drawings:

Figure 1 is a side elevation partially in section, showing a primaryunit arranged with the main tubes in a horizontal position, with anoptional secondary collector.

Figure 2 is a similar view showing a similar arrangement except that theinlet and outlet tubes are on the same end of the unit.

Figure 3 shows a vertical unit similar to Figure i. it being understoodthat while the center line of this unit is vertical, yet the unit can beplaced at an angle such as, for instance, 45.

Figure 4 is a view similar to Figure 3 showing a modification inarrangement similar to that shown in Figure 2.

Figure 5 is a cross sectional view of a. portion of the inlet tube ofthe dust collector showing the use of a bafile in the discharge endthereof.

Figure 6 is a cross sectional view of a portion of the inlet tube of thedust collector showing the use of a cone on the end of the inlet tube.

Secondary collectors can also be applied in like manner to any one ofthe constructions of the other views, but a secondary collector isparticularly adaptable to the form shown in Figures 1 and 3, but it isuseful in all forms for such purposes as remote dust disposal and thelike.

Referring to the drawings in detail, and in particular to Figure 1, itindicates an air or gas inlet into the chamber 2 formed by the end wall3 and side walls 3. The remaining wall of this chamber is formed by theinlet tube sheet 5 which is provided with a plurality of openings 8 forreceiving the inlet tubes I which are arranged in parallelism. The rearends of these tubes 1 are supported within openings 8 in theintermediate tube sheet 9. Within the tube I is mounted a spinner orseparator member l0 havmg an airfoil nose section it at its inlet end.

' This spinner or separator member I0 is maintained in spaced parallelrelationship to the inside of the tube 1 by the helix 8!. The rear endof the separator member at It is separated from the entrance end M ofthe outlet tube AS, the outlet end of which I6 is supported within theopening ll of the outlet tube sheet l8. This'outlet end It opens intothe outlet chamber is formed by the sheet ii on one side, the side walls20 and It, and the end wall 22. The outlet discharges at 23. Sheet 18can also be at an angle. The entrance of the dust and gases can be fromany direction.

Returning to the outlet tube 45, it will be noted on it is mounted aplate or conical deflector 2d, the outer edge of which at 250. is spacedfrom the inside of the inlet tube 1. This space between 25a and lcommunicates with the interior of the chamber 25 formed by theintermediate tube sheet 9 and outlet tube sheet it, the side walls 26and hopper bottom 21 having an opening 28. 29 serves as a top forenclosing the structure. The exit 23 can be in any direction.

Referring to the operation of the construction shown in Figure 1, thedust laden air or gases enter through i into the chamber 2 where theyenter the tubes 1 which divide the same into a plurality of parallelstreams. Each stream has imparted to it a helical motion by the helix l2so that the major portion of the dust as it is carried along with theair or gas is thrownoutwardly against the inside periphery-of thetube 1. This leaves the central part of each of these streamssubstantially dust free so that the dust free air will pass into theopen end l4 of the outlet tube l5 and thence through the outlet end l6of the tube l5 into the chamber l9 whence the dust free air passesoutwardly through the exit opening 23.

The dust is discharged through the space between the deflector 24 at 25cand the inside of the tube I. This dust enters the chamber 26 whence itpasses through the opening 28. If a secondary collector is used, asshown, connected to the dust outlet 28, a percentage of air or gas iscarried through with the dust. This carrying air is removed from thedust and usually discharged back through 33a into the inlet chamber 2and the dust deposited in some suitable container.

Referring to Figure 2, 30a designates an inlet opening for dust togetherwith gas or air. Such gases or air with the dust enters into the cham-.ber 3| for admission into the tubes 32 and thus is dividedintoindependent streams. The helix 33 imparts a helical motion so that thedust is thrown outwardly on the inside of the tube 32. The separatormember core 34 extends an appreciable distance beyond the helix 33.Spaced from the left hand end of the tube 34 isa plate 36. The peripheryof this plate 36 is spaced inwardly from the inside of the tube 32leaving a clearance through which dust passes. Where cone 30 is used; itis provided with an outlet opening for dust and under certain conditionsa percentage of gas or air. The opening is desighated 38. The hopper 39receives the material thus discharged which passes out through theopening 40 into a receptacle or into a secondary collector. The dustfree air turns 180 and enters the open end 35 of the separator pipe 34.This dust free air is then discharged into the chamber 4| whence itpasses out through the opening 42.

With reference to Figure 2, if you use the cone 30. the deflector plate36 is notabsolutely necessary. The reverse is also true that if you havethe deflector plate you do not necessarily need the cone.

One of the advantages of the reverse flow type is the elimination ofthenecessity of a secondary collector with aconsequent savings in cost,space and the like. While you can use the secondary, and it has someadvantages under certain circumstances, yet generally speaking it is notnecessary.

The first advantage of this construction in Figures 1 to 4 is thereduction of size and therefore the space requirements which areparticu-' larly critical in introducing a dust collector into a powerhouse or similar installation.

It will be noted that the separator tubes 32 are mounted at the righthand end in the inlet tube sheet 43 and supported at the left hand endby the" sheet 44.' The separator tube 34 when extended at 34c becomes anoutlet tube for dust free air or gas. In the previous Figure 1 wherethere is straight line flow the outlet tube I5 is spaced from theseparator tube [0. v

The tubes 32 are mounted within the usual casing 45 across which arearranged the plates or partitions 43 and 44. The partition 45 separatesthe inlet compartment 3| from the outlet compartment 4|, and can bearranged angular as shown, or in steps (Figure 5) to facilitatemanufacture. 9 Referring to Figure 3, which shows a vertical collector,it will be understood that this collecto may be arranged at any desiredangle such a 45 to the vertical. The air or gas inlet is at 41. or maybe arranged with a chamber as Figures 1 and 2. The air or gas carryingthe dust enters through the opening 41 into the chamber 48 and thenceinto its respective inlet tube 49 over the airfoil nose section 50 onthe entering end of the separator tube 5| on which is mounted a helix52. Thus the dust laden air is moved in a spiral path and the dust isthrown out centriiugally against the inside of the tube 49. The dust,with some air or gas when a secondary collector is used, passes alongthe inside periphery of the tube, out the end of the tube, over thedeflector 53 which is mounted on the air outlet tube 54, through theopen end of which at 55 the dust free air passes into the outlet chamber56 and thence through the outlet opening Bl. The tube 54 is mounted in adiagonal or stepped plate known as the outlet tube sheet designated 53.The dust discharged over the deflector 53 between the deflector and theinside of the tube 43 descends into the compartment 59 or which 58 isthe bottom. The dust so deposited then descends to the outlet passageill and it may then pass into a secondary collector where any remainingor conveying air is separated from the dust, or it may be dischargedinto a receptacle or conveying system.

It will be noted that the outlet tubes 54 for clean air are of varyinglengths so as to discharge at difierent points into the chamber 53. Thischamber may also discharge vertically down or to either side.

Referring to Figure 4, the dust laden air or gases enter at 62 in ahorizontal direction. They enter the compartment 63, the bottom of whichis formed by the inlet tube sheet 34 and the top of which is formed bythe diagonally arranged outlet tube sheet 65. The inlet tube sheet 64has mounted therein a plurality of inlet tubes 65 on which are mounted ahelix 61 that extends part way of the tube. The helix serves to throwthe dust centrifugally outwardly against the periphery of the inside ofthe inlet tube '63. The dust thrown out continues downwardly between theperiphery of the deflector plate 63 and the inside of the tube 66 intothe hopper ll whence the dust passes out through the opening 12, or whencone (:9 is used dust passes from the tube 66 into cone 69 out ofopening 10 into hopper H and out through opening 12. The dust free airis discharged centrally through the extended end II of the tube 14 onwhich is mounted the helix. This dust free air is discharged through theoutlet pipe 15 that extends through the outlet tune sheet 65 whence thedust free air is discharged into the chamber 16 and thence through theopening ll. The chamber may discharge either vertically as shown,angularly, or horizontally as Figure 3. The inlet tubes may be belled asat 66a to facilitate entry (Figures 3 or 4) or they may be made straightas in Figures 1 and 2.

The casing 18 surrounding the several tubes 63 has'its bottom closed bythe hopper H. The secondary collector is designated 19 (Figure 1). Thedust with its associated air enters the passage 80 into the collector.The dust descends in a spiral of descending and contracting size due tothe contracting portions 8|, 82, etc., of the secondary collector whilethe dust free air passes out the passageway 83, and discharges to inletchamber 2 or elsewhere.

A secondary collector shown as optional with Figure 1, is also optionalwith the rest of the construction shown in the other views. One of theadvantages, however, of the reverse flow type in Figures 2 and 4 is theelimination of necessity,

except under exceptional circumstances, of the secondary collector,thereby saving in space and cost. It also simplifies the installationand constziuction.

It will be understood that I desire to comprehend within this inventionand the claims which follow hereinafter, such variations in constructionand details as may be necessary to practice the principles of theinvention.

Having thus fully described my invention, what I claim as new and desireto secure'by Letters Patent is:

1. In a multiple tube dust collector, an air inlet chamber, a dustcollecting chamber; a plurality of pipes of substantially uniformdiameter disposed parallel with respect to one another and extendingfrom said inlet chamber to said dust collecting chamber and openingdirectly thereinto for conveying dust laden air, means therein forimparting a helical movement'to the air and dust whereby the dust isthrown out centrifugally on the interior of said pipes, a clean air pipemounted within each of said first mentioned pipes at least a portion ofthe length thereof and extending beyond the end of the first mentionedpipes, means for receiving clean air from said clean air pipes, a bafllepositioned upon each of said clean air pipes having the edge thereofpositioned closely adjacent the wall of the first mentioned pipe anddisposed inwardly of the end of said first mentioned pipe.

2. In-a multiple tube dust collector, an air inlet chamber, a dustcollecting chamber, a plurality of inlet tubes of substantially uniformdiameter whereby the dust is thrown out centrifugally on the interior ofsaid inlet tubes, and baflle means disposed within the discharge end ofeach of said inlet tubes having the edge thereof positioned adjacent thewall of said inlet tube and disposed inwardly of the end of said inlettube.

HARRY O. DANZ.

